receive.lst

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C51 COMPILER V8.02   RECEIVE                                                               08/21/2008 13:57:08 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE RECEIVE
OBJECT MODULE PLACED IN receive.OBJ
COMPILER INVOKED BY: C:\Keil\uv3\C51\BIN\C51.EXE receive.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include"reg52.h"
   2          #define uchar unsigned char
   3          uchar a[12];//记录0-F与和校验字节
   4          bit t1s=0; //1秒到标志
   5          bit rsucc=0; //接收成功标志
   6          bit rstart=0;  //开始接收0-F与和校验字节标志
   7          sbit SCON7=SCON^7; //帧错误
   8          uchar rmath=0;   //求和
   9          uchar t=0;
  10          
  11          /***********初始化T0T1************/
  12          init()
  13          {
  14   1      SCON=0xd0;//方式3
  15   1      TL1=0xfa; 
  16   1      TH1=0xfa;
  17   1      TH0=0x3c;
  18   1      TL0=0xb0;       //50ms
  19   1      TMOD=0x21; //T0工作于16位定时，T1于8位自动重装
  20   1      PCON|=0x40;     //错误侦测功能
  21   1      ET1=0;
  22   1      ET0=1;
  23   1      TR1=1;
  24   1      RI=0;
  25   1      //TR0=1;
  26   1      EA=1;
  27   1      }
  28          
  29          /*********错误要求重发*************/
  30          void error()
  31          {
  32   1      rstart=0; //一有错误就清帧开始位
  33   1      rmath=0;
  34   1      ACC=0xa6;
  35   1      TB8=P;
  36   1      SBUF=ACC;
  37   1      //P1=ACC;
  38   1      }
  39          
  40          /*********接收部分***********/
  41          void receive()
  42          {
  43   1      uchar j,sum;
  44   1      unsigned int rsum=0;
  45   1      //while(TI)
  46   1      //TI=0;
  47   1      while(rsucc==0)
  48   1      {
  49   2      while(RI==0);//等待接收一个完整的数据帧
  50   2      {
  51   3      RI=0;
  52   3      if(SCON7)
  53   3      error();  //没有收到停止位，要求重发
  54   3      ACC=SBUF;
  55   3      //P1=SBUF;
C51 COMPILER V8.02   RECEIVE                                                               08/21/2008 13:57:08 PAGE 2   

  56   3      if(P^RB8!=0)   //奇偶校验
  57   3      error();
  58   3      if(ACC==0xaa)//首帧正确
  59   3      rstart=1;
  60   3      if(rstart)
  61   3      {
  62   4      a[rmath]=SBUF;
  63   4      rmath++;
  64   4      //P1=SBUF;
  65   4      if(rmath==16)
  66   4      {
  67   5      rmath=0;
  68   5      for(j=0;j<16;j++)
  69   5      rsum+=a[j];
  70   5      sum=rsum;
  71   5      //j++;
  72   5      if(sum==a[17])
  73   5      {
  74   6      rstart=0; //全接收后复位
  75   6      rsucc=1; //成功接收标志置1
  76   6      TR0=1; // 允许中断
  77   6      }
  78   5      else
  79   5      error(); //错误重发
  80   5      }//P1=0x40;
  81   4      }
  82   3      }}}
  83          
  84          /**************T0中断入口**************/
  85          void timer0() interrupt 1
  86          {
  87   1      TL0=0xb0;
  88   1      TH0=0x3c;
  89   1      t++;
  90   1      if(t==20)
  91   1      {t1s=1;
  92   2      t=0;
  93   2      }}
  94          
  95          /*************主函数 ****************/
  96          void main()
  97          {
  98   1      uchar i=0;
  99   1      init();
 100   1      while(1)
 101   1      {
 102   2      if(rsucc)
 103   2      {
 104   3      if(t1s)
 105   3      t1s=0;
 106   3      P1=a[i]; //依次把帧首字节与0-F分别送到P1口
 107   3      i++;
 108   3      if(i==16)
 109   3      {i=0;
 110   4      rsucc=0; //等待下一次
 111   4      }
 112   3      }
 113   2      receive();
 114   2      }}


MODULE INFORMATION:   STATIC OVERLAYABLE
C51 COMPILER V8.02   RECEIVE                                                               08/21/2008 13:57:08 PAGE 3   

   CODE SIZE        =    204    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     14    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      3    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)